<template>
	<view v-if="getCart.length !== 0" class="cart-container">
		<!-- 收货地址区域 -->
		<my-address />
		<!-- 购物车商品列表的标题区域 -->
		<view class="cart-title">
			<!-- 左侧的图标 -->
			<uni-icons type="shop" size="18"></uni-icons>
			<!-- 描述文本 -->
			<text class="cart-title-text">购物车</text>
		</view>
		<!-- 列表区域 -->
		<!-- uni-swipe-action 是最外层包裹性质的容器 -->
		<uni-swipe-action>
			<block v-for="item in getCart" :key="item.goods_id">
				<!-- uni-swipe-action-item 可以为其子节点提供滑动操作的效果。需要通过 options 属性来指定操作按钮的配置信息 -->
				<uni-swipe-action-item :rightOptions="options" @click="swipeActionClickHandler(item)">
					<my-goods :goods="item" :showRadio="true" :showNum="true" @radio-change="radioChangeHandler"
						@num-change="numChangeHandler"></my-goods>
				</uni-swipe-action-item>
			</block>
		</uni-swipe-action>
		<!-- 结算区域 -->
		<my-settle></my-settle>
	</view>
	<!-- 空白购物车区域 -->
	<view class="empty-cart" v-else>
		<image src="/static/cart_empty@2x.png" class="empty-img"></image>
		<text class="tip-text">空空如也~</text>
	</view>
</template>

<script>
	// 导入自己封装的 mixin 模块
	import badgeMix from '@/mixins/tabbar-badge.js'
	import {
		mapGetters,
		mapMutations
	} from 'vuex'

	export default {
		data() {
			return {
				options: [{
					text: '删除', // 显示的文本内容
					style: {
						backgroundColor: '#C00000' // 按钮的背景颜色
					}
				}]
			}
		},
		mixins: [badgeMix],
		computed: {
			...mapGetters('m_cart', ['getCart'])
		},
		methods: {
			...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
			// 商品的勾选状态发生了变化
			radioChangeHandler(goods) {
				this.updateGoodsState(goods)
			},
			// 商品数量发生了改变
			numChangeHandler(goods) {
				this.updateGoodsCount(goods)
			},
			swipeActionClickHandler(goods) {
				if (!goods) return
				this.removeGoodsById(goods.goods_id)
			}
		}
	}
</script>

<style lang="scss" scoped>
	.cart-container {
		padding-bottom: 100rpx;

		.cart-title {
			height: 80rpx;
			display: flex;
			align-items: center;
			font-size: 24rpx;
			padding-left: 10rpx;
			border-bottom: 2rpx solid #efefef;

			.cart-title-text {
				margin-left: 20rpx;
			}
		}
	}

	.empty-cart {
		display: flex;
		flex-direction: column;
		align-items: center;
		padding-top: 300rpx;

		.empty-img {
			width: 180px;
			height: 180px;
		}

		.tip-text {
			font-size: 30rpx;
			color: gray;
			margin-top: 30rpx;
		}
	}
</style>
